公开(公告)号：US20200085397A1

公开(公告)日：2020-03-19

申请号：US16499466

申请日：2017-05-29

Applicant: Shimadzu Corporation

Inventor： Tetsuya KOBAYASHI

IPC: A61B6/00 ,  G06T7/00 ,  G06T11/00 ,  G06F17/18

Abstract: In the attenuation coefficient image estimation method of the present invention, an attenuation coefficient value is corrected in Step S8 (μ=μ′+α×μoff) based on a mathematical relationship in which the difference between a value of a non-quantitative image μ′ in a region Ω and a known attenuation coefficient value (a value of a true attenuation coefficient image) can be approximated by α×μoff obtained by multiplying an offset image μoff by a coefficient α. Therefore, in the attenuation coefficient image having the attenuation coefficient value μ corrected in Step S8 (μ=η′+α×μoff), a systematic error becomes small. As a result, a quantitative attenuation coefficient image can be generated, which enables accurate attenuation correction of the radioactivity image.